Description
In the Linux kernel, the following vulnerability has been resolved: usb: class: cdc-wdm: fix reordering issue in read code path Quoting the bug report: Due to compiler optimization or CPU out-of-order execution, the desc->length update can be reordered before the memmove. If this happens, wdm_read() can see the new length and call copy_to_user() on uninitialized memory. This also violates LKMM data race rules [1]. Fix it by using WRITE_ONCE and memory barriers.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
afba937e540c902c989cd516fd97ea0c8499bb27 to < 638328ca9c17ae6511ad62198c57bae32ffa3c91affectedafba937e540c902c989cd516fd97ea0c8499bb27 to < 170e8daca24da6edb4be82ab01abf44e87af387baffectedafba937e540c902c989cd516fd97ea0c8499bb27 to < c8fa96ed021923dae147bcd9f9205b8df7b82360affectedafba937e540c902c989cd516fd97ea0c8499bb27 to < 4ee3062bf2c9a722afef429826e8607eaf3fc6a0affectedafba937e540c902c989cd516fd97ea0c8499bb27 to < 276aef0fd2b92f41b920ac891c72cadeee957934affectedafba937e540c902c989cd516fd97ea0c8499bb27 to < 67ed312124bb1b61858778ac0b985b48961c862aaffectedafba937e540c902c989cd516fd97ea0c8499bb27 to < e3c874b05901dc519054b5107d16620e6d2b5feaaffectedafba937e540c902c989cd516fd97ea0c8499bb27 to < 8df672bfe3ec2268c2636584202755898e547173affected
Linux Linux
Default version status: affected
2.6.26affected0 to < 2.6.26unaffected5.10.253 to ≤ 5.10.*unaffected5.15.203 to ≤ 5.15.*unaffected6.1.167 to ≤ 6.1.*unaffected6.6.130 to ≤ 6.6.*unaffected6.12.78 to ≤ 6.12.*unaffected6.18.19 to ≤ 6.18.*unaffected6.19.9 to ≤ 6.19.*unaffected7.0 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/638328ca9c17ae6511ad62198c57bae32ffa3c91 ↗
- https://git.kernel.org/stable/c/170e8daca24da6edb4be82ab01abf44e87af387b ↗
- https://git.kernel.org/stable/c/c8fa96ed021923dae147bcd9f9205b8df7b82360 ↗
- https://git.kernel.org/stable/c/4ee3062bf2c9a722afef429826e8607eaf3fc6a0 ↗
- https://git.kernel.org/stable/c/276aef0fd2b92f41b920ac891c72cadeee957934 ↗
- https://git.kernel.org/stable/c/67ed312124bb1b61858778ac0b985b48961c862a ↗
- https://git.kernel.org/stable/c/e3c874b05901dc519054b5107d16620e6d2b5fea ↗
- https://git.kernel.org/stable/c/8df672bfe3ec2268c2636584202755898e547173 ↗